Lens



FIG. 1 is a top perspective view of a lens.

FIG. 2 is a bottom perspective view of a lens.

FIG. 3 is a front view thereof, the rear, left-side, and right-sideviews being substantially the same.

FIG. 4 is a top view thereof.

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a cross sectional view taken along line I—I of FIG. 4.

The ornamental design for a lens, as shown and described.